2985
8-CHANNEL SOURCE DRIVER
1
2
3
4
5
6
7
8
V
S
18
17
16
15
14
13
12
11
GND
Recommended for applications requiring separate logic and load grounds,
load supply voltages to 30 V, and load currents to 250 mA, the UDN2985A
source driver is used as an interface between standard low-power digital logic
and LEDs, relays, and solenoids. The outputs feature saturated transistors for
low collector-emitter saturation voltages.
The UDN2985A driver is for use with 5 V logic systems: TTL, Schottky
TTL, DTL, and CMOS. This device has a minimum output breakdown rating
of 30 V with a minimum output sustaining voltage of 15 V. The output is
switched on by an active-high input level.
Under normal operating conditions, this device can source up to 120 mA
for each of the eight outputs at an ambient temperature of 75°C and a supply
voltage of 15 V. It incorporates input current-limiting resistors and output
transient-suppression diodes.
The UDN2985A source driver is supplied in an 18-pin dual in-line
package. All inputs are on one side of the package, output pins on the other,
to simplify printed wiring board layout.
Data Sheet
29310.2A†
Dwg. No. A-10,243
FEATURES
I
I
I
I
I
TTL, DTL, or CMOS Compatible Inputs
250 mA Output Source Current Capability
Output Transient-Suppression Diodes
30 V Minimum Output Breakdown Voltage
Low Output-Saturation Voltage
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
°
C
Driver Supply Voltage, V
S
..................
30 V
Continuous Output Current,
I
OUT
........................................
-250 mA
Input Voltage, V
IN
...............................
20 V
Package Power Dissipation,
P
D
..............................................
2.2 W*
Operating Temperature Range,
T
A
...............................
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
...............................
-55
°
C to +150
°
C
*Derate at the rate of 18 mW/°C above
T
A
= 25°C.
PARTIAL SCHEMATIC DIAGRAM
1 of 8 DRIVERS
Dwg. No. DS-1013
Always order by complete part number:
UDN2985A
.
2985
8-CHANNEL
SOURCE DRIVER
ELECTRICAL CHARACTERISTICS at T
A
= 25
°
C, V
S
= 30 V (unless otherwise noted).
Limits
Characteristics
Output Leakage Current
Output Sustaining Voltage
Output Saturation Voltage
Symbol
I
CEX
V
CE(sus)
V
CE(SAT)
Test Conditions
V
IN
= 0.4 V, V
OUT
= 0 V
l
OUT
= -120 mA, L = 3 mH
V
IN
= 2.4, l
OUT
= -60 mA
V
IN
= 2.4, l
OUT
= -120 mA
Input Current Voltage
I
IN(ON)
V
IN
= 2.4 V
V
IN
= 5.0 V
I
IN(OFF)
Supply Current
(outputs open)
Clamp Diode
Leakage Current
Clamp Diode
Foward Voltage
Turn-On Delay
Turn-Off Delay
I
S
I
R
V
F
t
ON
t
OFF
V
IN
= 0.4 V
V
S
= 30 V, V
IN
= 2.4 V
V
R
= 30 V, T
A
= 70°C
I
F
= 120 mA
Min.
—
15
—
—
—
—
—
—
Typ.
<-1.0
—
0.8
0.9
90
280
10
10
Max.
-100
—
1.1
1.2
225
650
15
15
Units
µA
V
V
V
µA
µA
µA
mA
µA
V
µs
µs
—
<1.0
50
—
1.1
2.0
—
—
0.5
5.0
1.0
10
NOTE: Negative current is defined as coming out of (sourcing) the specified device pin.
COMMON-CATHODE LED DRIVER
Dwg. No. DS-1014
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1984, 2000 Allegro MicroSystems, Inc.
2985
8-CHANNEL
SOURCE DRIVER
Dimensions in Inches
(controlling dimensions)
18
10
0.014
0.008
0.430
0.280
0.240
MAX
0.300
BSC
1
0.070
0.045
0.100
0.920
0.880
BSC
9
0.005
MIN
0.210
MAX
0.015
MIN
0.150
0.115
0.022
0.014
Dwg. MA-001-18A in
Dimensions in Millimeters
(for reference only)
18
10
0.355
0.204
10.92
7.11
6.10
MAX
7.62
BSC
1
1.77
1.15
2.54
23.37
22.35
BSC
9
0.13
MIN
5.33
MAX
0.39
MIN
3.81
2.93
0.558
0.356
Dwg. MA-001-18A mm
NOTES: 1.
2.
3.
4.
Exact body and lead configuration at vendor’s option within limits shown.
Lead spacing tolerance is non-cumulative.
Lead thickness is measured at seating plane or below.
Supplied in standard sticks/tubes of 21 devices.
2985
8-CHANNEL
SOURCE DRIVER
POWER SOURCE DRIVERS
IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS
Output Ratings *
mA
-25
V
60
60
60
60
60
85
-25
30
#
8
10
12
20
32
8
8
8
Serial
Input
–
X
X
X
X
–
–
–
Features
Latched
Diode Saturated
Drivers
Clamp
Outputs
X
–
–
X active pull-down –
X active pull-down –
X
X
–
–
–
active pull-down
active pull-down
–
X
X
–
–
–
X
X
Internal
Protection
–
–
–
–
–
–
–
–
†
Part Number
5815
5810-F and 6809/10
5811 and 6811
5812-F and 6812
5818-F and 6818
6118
2585
2985
-120
50
8
X
X
X
X
–
5895
-350
35
8
–
–
X
–
X
2987
50
8
–
–
X
–
–
2981 and 2982
50
8
X
X
X
–
–
5891
-50
8
–
–
X
–
–
2580
80
8
–
–
X
–
–
2983 and 2984
80
8
X
X
X
–
–
5890
-80
8
–
–
X
–
–
2588
-500
6
1
–
–
–
MOSFET
X
2525 and 2535
6
2
–
–
–
MOSFET
X
2526 and 2536
-4000
60
4
–
–
X
–
–
2944
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or
over-current protection voltage limits.
† Complete part number includes additional characters to indicate operating temperature range and package style.
The products described here are manufactured under one or more
U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support devices or systems without express written approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi-
bility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
